| Summary: |
driFlipRenderbuffers() called with NULL fb argument -> CRASH |
| Product: |
Mesa
|
Reporter: |
Bernie Innocenti <bernie> |
| Component: |
Drivers/DRI/r300 | Assignee: |
Default DRI bug account <dri-devel> |
| Status: |
RESOLVED
FIXED
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QA Contact: |
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| Severity: |
major
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| Priority: |
medium
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| Version: |
git | |
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| Hardware: |
All | |
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| OS: |
Linux (All) | |
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| Whiteboard: |
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i915 platform:
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i915 features:
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|---|
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When I quit a hung compiz instance of compiz the X server segfaults like this: Backtrace: 0: X(xf86SigHandler+0x6a) [0x47f9c8] 1: /lib64/libc.so.6 [0x3001630510] 2: /usr/local/fdo/lib64/modules/dri/r300_dri.so(driFlipRenderbuffers+0) [0x2aaabdad52c0] 3: /usr/local/fdo/lib64/modules/dri/r300_dri.so(radeonGetLock+0x349) [0x2aaabdad7e89] 4: /usr/local/fdo/lib64/modules/dri/r300_dri.so(r300FlushCmdBuf+0x67) [0x2aaabdae02b7] 5: /usr/local/fdo/lib64/modules/dri/r300_dri.so(r300DestroyContext+0x460) [0x2aaabdadd900] 6: /usr/local/fdo/lib64/modules/dri/r300_dri.so [0x2aaabdad1f2a] 7: /usr/local/fdo/lib64/xorg/modules/extensions//libglx.so [0x2aaaab1f9bb9] 8: /usr/local/fdo/lib64/xorg/modules/extensions//libglx.so(__glXFreeContext+0x69) [0x2aaaab1cd0f3] 9: /usr/local/fdo/lib64/xorg/modules/extensions//libglx.so [0x2aaaab1cd423] 10: X(FreeClientResources+0x68) [0x43139c] 11: X(CloseDownClient+0x1a8) [0x448651] 12: X(Dispatch+0x384) [0x448d3e] 13: X(main+0x468) [0x4304fa] 14: /lib64/libc.so.6(__libc_start_main+0xf4) [0x300161d9c4] 15: X(FontFileCompleteXLFD+0x219) [0x42f859] Applying the following patch, I see the error message. Not a proposed fix, it's just to show what's going on. diff --git a/src/mesa/drivers/dri/r300/radeon_lock.c b/src/mesa/drivers/dri/r300/radeon_lock.c index 1a2dfca..cacc383 100644 --- a/src/mesa/drivers/dri/r300/radeon_lock.c +++ b/src/mesa/drivers/dri/r300/radeon_lock.c @@ -56,7 +56,10 @@ static void radeonUpdatePageFlipping(radeonContextPtr radeon) radeon->doPageFlip = radeon->sarea->pfState; if (!radeon->doPageFlip) { - driFlipRenderbuffers(radeon->glCtx->WinSysDrawBuffer, GL_FALSE); + if (radeon->glCtx->WinSysDrawBuffer) + driFlipRenderbuffers(radeon->glCtx->WinSysDrawBuffer, GL_FALSE); + else + fprintf(stderr, "Flipping with NULL WinSysDrawBuffer"); } use_back = (radeon->glCtx->DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_BACK_LEFT);